公开(公告)号：US3729634A

公开(公告)日：1973-04-24

申请号：US3729634D

申请日：1971-09-20

Applicant: RECOGNITION SYSTEMS

Inventor： JENSEN N ,  THOMASSON J ,  MEAD D

IPC: G03H1/00 ,  G02B27/00 ,  G01J1/36

CPC classification number: G03H1/00 ,  Y10S359/90

Abstract: This invention comprises apparatus for controlling the ratio of the signal and reference beams in a system for making holographic filters for use in matched filter pattern recognition apparatus. Means is provided for measuring the intensity of the spatial frequencies of a signal beam, and means is provided for measuring the intensity of a reference beam. The difference between the measured beam ratio and the optimum beam ratio controls an attenuator placed in either the reference beam path or the signal beam path. A shutter may also be controlled so that uniformity of exposure is maintained as the beam ratio is adjusted.

Abstract translation: 本发明包括用于控制在用于匹配滤波器图案识别装置中的用于制造全息滤光器的系统中的信号和参考光束的比率的装置。 提供了用于测量信号光束的空间频率的强度的装置，并且提供用于测量参考光束的强度的装置。 测量光束比和最佳光束比之间的差异控制放置在参考光束路径或信号光束路径中的衰减器。 还可以控制快门，使得当调节光束比例时，保持曝光的均匀性。